Super Comfort Phone Headset with Noise Cancelling Microphone Specialized for Avaya phones. Some Avaya phones models are special which require microphone amplification on headset. This headset comes with circuit box on cable to make sure microphone voice is loud enough for the other end to be heard. Compatible with below models(including but not limited): 11xx series: 1120e, 1140e, 1150e, 1165e 94xx, 95xx series: 9404, 9406, 9408, 9504, 9508 16xx or 96xx series: J139, J169, J179, 1608, 1616, 9608, 9610, 9611, 9611G, 9620, 9620C, 9620L, 9621, 9630, 9630G, 9640, 9640G, 9641, 9641G, 9650, 9650G, 9650C, 9670 14xx, 24xx, 46xx, 54xx, 56xx or 64xx series: 1408, 1416, 2410, 2420, 4606, 4610, 4610SW, 4612, 4620, 4620SW, 4621, 4621SW, 4622SW, 4624, 4625SW, 4630, 4630SW, 5410, 5420, 5610, 5620, 5621, 5625, 6416D+M, 6424D+M, QE4610Compatibility and Two Years Warranty: Please check in for compatibility list(including but not limited). If you don't see your phone model, please check other sizes of this product. Still if you couldn't find it, please contact us freely for compatibility guide advice. We promise 2-year warranty. In case there is any question or problem using the headset, please send us message. We will reply within 24hs ASAP. Great Durability: Light weight and tough design, stainless steel headband, superior quality speaker and microphone, reliable plastic parts. Reinforced cord built with Kevlar to withstand demanding environment and to protect against office chair wheels, sharp objects for daily use. Compete with Plantronic and Jabra headset for all day long heavy use. Super Comfortable Headset: RJ9 headset with super soft protein leatherette ear cushion,user-friendly hygiene, adjustable headband to fit for different head sizes, ear cover rotatable,no pain no push to ears for all day long wearing. Microphone arm 330 degree rotable for wearing mic on either side, super call center headset for telemarketing and offices. High Quality Sound: Phone headset with noise cancelling microphone and HD audio sound ensure easy and clear communication for call centers, offices and home phones even in noisy environment. Wideband audio solution offers natural and clear hearing. Anti acoustic shock for hearing protection. Avaya Headset: This office headset is specialized for Avaya IP phones 1408 1416 2410 2420 4606 4610 4610SW 4612 4620 4620SW 4621 4621SW 4622SW 4624 4625SW 4630 4630SW 5410 5420 5610 5620 5621 5625 6416D+M 6424D+M QE4610 J139 J169 J179 1608 1616 9608 9610 9611 9611G 9620 9620C 9620L 9621 9630 9630G 9640 9640G 9641 9641G 9650 9650G 9650C 9670 including but not limited.